Hidden Vehicle Door Handle Control for Touch Unlocking

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Solution Overview

Problem

Existing vehicle door handle systems with hidden designs do not enhance user experience as they require manual pulling, failing to improve upon conventional door handles.

Innovation Solution

A control method and apparatus that utilizes capacitive sensors to detect touch signals on designated areas, determining vehicle state and key position to automatically unlock doors without manual handle pulling, including features for guard mode control and thermal protection of motors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If hidden door handle design is used, then aesthetic appearance is improved, but ease of operation deteriorates because manual pulling is still required

Engineering Contradiction:
Improvedoor handle appearanceVSAvoiddoor opening operation
Core Design Contradiction:
ShapeVSEase of operation

Solution Approach 1:

The patent replaces the traditional mechanical pulling operation with an electronic control system. Capacitive sensors detect touch signals, and a control unit automatically activates the door unlocking mechanism, eliminating the need for manual handle pulling while maintaining the hidden aesthetic design

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The door handle system performs automatic unlocking functionality without requiring user intervention beyond the initial touch. The system autonomously determines whether to unlock based on sensor input and control logic, making the operation self-serving and improving ease of use

Inventive Principle:
Principle #25Self-service

2Ease of operation

If automatic door unlocking is implemented, then ease of operation is improved, but device complexity increases due to additional sensors and control systems

Engineering Contradiction:
Improvedoor unlocking operationVSAvoidcontrol system structure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The control unit serves multiple functions: it processes touch signals from capacitive sensors, determines guard mode status, controls door handle actuation, and manages thermal protection. By consolidating these functions into a single control unit, the system achieves automatic unlocking without proportionally increasing overall device complexity

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines the capacitive sensor, control unit, and door handle actuation mechanism into an integrated system. The control unit merges signal processing, decision-making, and actuation control functions, reducing the number of separate components and simplifying the overall device structure

Inventive Principle:
Principle #5Merging (Combining)

3Ease of operation

If frequent door operations are allowed, then ease of operation is improved, but reliability deteriorates due to motor thermal accumulation

Engineering Contradiction:
Improvedoor operation frequencyVSAvoidmotor durability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The control unit continuously monitors the thermal state of the door handle motor and uses this feedback to control operation frequency. When thermal accumulation exceeds safe thresholds, the system automatically restricts further operations, preventing motor damage while allowing frequent operations within safe parameters

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system implements periodic thermal monitoring and enforces operation intervals based on thermal recovery time. After a door operation, the motor enters a cooldown period where additional operations are blocked, creating a periodic pattern that protects motor reliability while permitting sufficient operational frequency

Inventive Principle:
Principle #19Periodic action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances user experience by allowing door unlocking without manual handle pulling, improving convenience and safety through automated door operation and motor protection.

Implementation Method 1

when a touch signal of a first touch area is collected

Methodology Applied
Scientific EffectCapacitive sensing: Capacitance

Implementation Method 2

door handles of the vehicle are driven to stretch out

Methodology Applied
Scientific EffectElectromagnetic conversion: Electromagnetic Induction

Data Source

PatentUS12546146B2Control method for vehicle door and apparatus, vehicle and computer storage medium
Publication Date: 2026.02.10 BYD CO LTD
  • US12546146B2 patent drawing
  • US12546146B2 patent drawing
  • US12546146B2 patent drawing

AI summary

Provided are a control method for vehicle door and apparatus, a vehicle and a computer storage medium, and the control method for vehicle door includes: in response to a touch signal of a first touch area is collected, acquiring vehicle state information and key position information; in response to determine that the touch signal of the first touch area is valid and is a guard mode off request signal according to the vehicle state information and the key position information, controlling the vehicle to turn off a guard mode and driving door handles of the vehicle to stretch out; and after the door handles stretch out, in response to a touch signal of a second touch area corresponding to any door handle is collected, determining that the touch signal of the second touch area is valid according to the vehicle state information, and controlling a vehicle door corresponding to the door handle to unlock.